I am in central Vermont, 5 below last night. I have 6 chickens, all 32 weeks old. 1 Plymouth Rock Rooster, 2 hens and 3 golden comet hens. The temp in the coop got down to 20 last night, it's not drafty in there though. I have pine shavings and hay on the floor, about 2-4 inches. They eat blue seal HomeFresh layer feed, some scratch and I give them table scraps as a warm treat every night. There is a window close to teh floor they like to look out through, I noticed some blood on it this morning, I inspected all 6 and couldn't find any evidence of a wound and I am wondering if it could be respritory and they are coughing up blood. They are all laying fine and acting OK, other then not liking the cold weather, especially the rooster. Does anyone have an idea about anything else I should be doing for them or any thoughts on where the blood can be coming from.